One or more of the following occur:
Check these settings in Home->Resources.
For more details see Timesheets not posting when resource time settings are incorrect
These settings can be validated from the project / investment side.
Starting in 16.0.0, there is a new job introduced in order to populate the cost plans actuals in the modern UX. The job (Update Financial Plan Actuals and Forecast Job) which calculates the actuals and forecast in cost and budget plans. Run the Post to WIP job before running this job.